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kongyo2

EVE Online ESI MCP Server

region_orders

Get market orders for a specified region in EVE Online, with optional filters for item type, order type, and pagination.

Instructions

Retrieve market orders for a specific type in a given region in EVE Online.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pageNoThe page number for pagination.
type_idNoThe type ID of the item to fetch orders for.
regionIdYesThe ID of the region to fetch market orders from.
order_typeNoThe type of order to filter by.
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description should disclose behavioral traits like pagination, filtering, or return format. It only states the basic action, omitting important details like the order_type filter or that results are paginated via the page parameter.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

One clear sentence with no wasted words. Could be slightly expanded for added clarity, but it is concise and front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given that there are 4 parameters and no output schema, the description is too minimal. It fails to explain pagination, the meaning of order_type, or what the return data looks like.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

All parameters are described in the input schema (100% coverage), so the description adds no extra meaning. Baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states it retrieves market orders for a specific type in a region. Verb and resource are specific, and it distinguishes from sibling tools like market_prices and public_contracts.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives, such as when to use market_prices instead. Lacks any when-to-use or when-not-to guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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